#1: You should consider a new fuel pump over 5 psi or so. They're cheap. Look on honda-tech, there's a sale on Walbros for like $90.

#2: You will need new injectors for turbo + nitrous. It's not an extra mod or something On your stock 240s you'll lean out the second you squeeze and you'll be buying yourself a new motor faster than you can say 'What happened to my eeengine?'

#3: FMUs don't work. Do not buy one. Get a proper fuel management system like a Hondata s100 w/ boost. Your engine will thank you.

#4: Digital boost controllers are a daily driver's best friend. Get one if you can afford it. I recommend the AVC-D.

You have three option: Cheap, fast, and reliable. Pick two.